This fixes a bug where dollop creation incorrectly
continued past IBTs. IBTs should always start a
dollop and this fixes that.

Move functionality to determine if a dollop for
an instruction already exists and whether to split
the containing dollop into AddNewDollop and use
that to implement UpdateTargets.

Test for some of the new type-specific
actions that can be performed on types.

that start/end on the same byte are actually
1-byte big. Update tests to confirm this.

calling RemoveFreeRange().

Updates for x86-64, adjusted memory_space.cpp to have O(ln(n)) complexity instead of O(N) in a few commo cases.